MSDN Magazine - February 2009 - (Page 84)

S i lv e r l i g h t Build Line-Of-Business Enterprise Apps With Silverlight, Part 2 Hanu Kommalapati During the first installment of this series, I introduced a call center scenario and showed a screen-population (screen pop) implementation through the connected sockets that utilized the asynchronous TCP sockets supported by Silverlight (please see msdn.microsoft.com/magazine/dd315415). The screen pop was implemented through a simulated call dispatcher that picked up a call from an internal queue and pushed notifications through the previously accepted socket connection cached in a generic list on the server. Here I will conclude by implementing application security, integrating with business services, and implementing cross-domain policies for Web services and application partitioning. The logical architecture of the call center This article discusses: • The Silverlight runtime environment • Silverlight asynchronous programming • Cross-domain policies • A sample enterprise application application is shown in Figure 1. The authentication service will be implemented in the utility service while the business services, ICallService and IUserProfile, will be implemented inside the business service project, as the name suggests. Even though the diagram shows event streaming to utility services, in the interest of time, the downloadable demo does not include this functionality. The implementation of the event capture service feature will be similar to the business services implementation. However, business events that are not critical errors can be cached locally into isolated storage and dumped onto the server in a batch mode. I will begin the discussion with the implementation of business services and conclude with application partitioning. Integration with Business Services Technologies discussed: Silverlight 2 Code download: code.msdn.microsoft.com/mag200902Silverlight 84 msdn magazine Integration with services is one of the important aspects of a line-of-business (LOB) application, and Silverlight provides ample components for accessing Web-based resources and services. HttpWebRequest, WebClient, and Windows Communication Foundation (WCF) proxy infrastructure are a few of the commonly used network components for HTTP-based interaction. In this article, I will use WCF services to integrate with the backend business processes. Most of us use Web services for integrating with the back-end data sources during the course of application development; WCF Web service access with Silverlight is not much different than it is http://msdn.microsoft.com/magazine/dd315415 http://code.msdn.microsoft.com/mag200902Silverlight

Table of Contents Feed for the Digital Edition of MSDN Magazine - February 2009

MSDN Magazine - February 2009 Contents Toolbox CLR Inside Out Data Points Cutting Edge Patterns In Practice Best Practices .Net Interop "Oslo" Basics Patterns Silverlight Under The Table Foundations Windows With C++ .NET Matters Going Places { End Bracket }

MSDN Magazine - February 2009

For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.